Accessible Content - Alternate Text

SFGOV (a) 1.1 - All IMG elements are required to contain either the ALT or LONGDESC attribute.

All meaningful non-text elements are required to contain a text equivalent, for example, by providing an ALT attribute, or in element content. Non-text elements include, but are not limited to, images, image map regions, applets and programmatic objects, frames, scripts, stand-alone audio files, audio tracks of video, and video.

Description

All images used in Web pages should use the alternate text attribute of the image tag (and other tags for respective objects) to provide a text equivalent in case the image can’t be displayed. The Alt-Text used should be a concise replacement for the image and should convey the purpose and meaning in a way that makes sense to the user.

Images

All images must have appropriate alternate text that effectively describes the image in a way that makes sense to the user. Alternate text should be brief, no more than a few words (150 characters):

Decorative Images

For images that are invisible, purely decorative, or otherwise do not convey meaning - do not add a text description in the Title field, leave this field empty . This will indicate that the image can be safely ignored by a screen reader.